反応 #833517

反応方程式

sulfuric acid

C.I. Pigment Red 254

sulfuric acid

→

diketopyrrolopyrrole

溶媒

water

water

反応条件

後処理

1. 1
   温度Subsequent to cooling
2. 2
   workup.ADDITIONits pouring
3. 3
   その他the precipitation of
4. 4
   ろ過The formed precipitate was collected by filtration
5. 5
   洗浄washed with water
6. 6
   その他to obtain a water-
7. 7
   その他was dried

実験手順

The pigment dispersant A1 of Synthesis Example A1 (3.75 parts) and C.I. Pigment Red 254 (6.25 parts) were added to 95% sulfuric acid (100 parts), followed by stirring at room temperature for 1 hour. Subsequent to cooling, the resulting concentrated sulfuric acid solution was poured into iced water (1,000 parts); its pouring led the precipitation of a composite according to the present invention. The formed precipitate was collected by filtration and then washed with water to obtain a water-based paste (39 parts, true amount: 10 parts). The water-based paste was dried to obtain a diketopyrrolopyrrole (a pigment dispersant A3, 10 parts), which was determined to contain on average 0.3 sulfonic group introduced per molecule from the results of an elemental analysis for sulfur.

出典